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61 lines
2.9 KiB
Markdown
61 lines
2.9 KiB
Markdown
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# systemd Project Licensing
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## Main License
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The systemd project uses single-line references to Unique Licese Identifiers as
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defined by the Linux Foundation's SPDX project (https://spdx.org/). The line in
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each individual source file identifies the license applicable to that file.
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The current set of valid, predefined SPDX identifiers can be found on the SPDX
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License List at https://spdx.org/licenses/.
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The 'LICENSES/' directory contains all the licenses used by the sources included in
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the systemd project source tree.
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Unless otherwise noted, the systemd project sources are licensed under the terms
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and conditions of the **GNU Lesser General Public License v2.1 or later**.
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New sources that cannot be distributed under LGPL-2.1-or-later will no longer
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be accepted for inclusion in the systemd project to maintain license uniformity.
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## Other Licenses
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The following exceptions apply:
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* some udev sources under src/udev/ are licensed under **GPL-2.0-or-later**, so the
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udev binaries as a whole are also distributed under **GPL-2.0-or-later**.
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* the header files contained in src/basic/linux/ and src/shared/linux/ are copied
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verbatim from the Linux kernel source tree and are licensed under **GPL-2.0 WITH
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Linux-syscall-note** and are used within the scope of the Linux-syscall-note
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exception provisions
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* the src/shared/initreq.h header is licensed under original license,
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**LGPL-2.0-or-later**.
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* the src/shared/linux/bpf_insn.h header is copied from the Linux kernel
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source tree and is licensed under either **BSD-2-Clause** or **GPL-2.0-only**,
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and thus is included in the systemd build under the BSD-2-Clause license.
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* The src/basic/linux/wireguard.h header is copied from the Linux kernel
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source tree and is licensed under either **MIT** or **GPL-2.0 WITH Linux-syscall-note**,
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and thus is included in the systemd build under the MIT license.
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* the following sources are licensed under the **MIT** license (in case of our
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scripts, to facilitate copying and reuse of those helpers to other projects):
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- hwdb.d/parse_hwdb.py
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- src/basic/linux/batman_adv.h
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- src/basic/sparse-endian.h
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- tools/catalog-report.py
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* the following sources are licensed under the **CC0-1.0** license:
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- src/basic/siphash24.c
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- src/basic/siphash24.h
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- src/systemctl/systemd-sysv-install.SKELETON
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- tools/check-includes.pl
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- all examples, code and scripts, under man/ except where otherwise noted
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* the following sources are under **Public Domain** (LicenseRef-murmurhash2-public-domain):
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- src/basic/MurmurHash2.c
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- src/basic/MurmurHash2.h
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* the following sources are under **Public Domain** (LicenseRef-lookup3-public-domain):
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- src/libsystemd/sd-journal/lookup3.c
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- src/libsystemd/sd-journal/lookup3.h
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* the tools/chromiumos/gen_autosuspend_rules.py script is licensed under the
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**BSD-3-Clause** license.
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* any files under test/ without an explicit license we assume non-copyrightable
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(eg: computer-generated fuzzer data)
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